ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCCCC%28%3DO%29NCc1ccc%28O%29c%28OC%29c1/file?format=sdf&get3d=True  -- CCCCCCCCC%28%3DO%29NCc1ccc%28O%29c%28OC%29c1 could not be loaded.